Atolls

Atolls are ring-shaped coral reefs, islands, or series of islets that encircle a lagoon either partially or fully. They are formed from the growth of coral reefs around the rim of a submerged volcanic island. Over time, as the volcanic island erodes and sinks, the coral reef continues to grow upward, resulting in the formation of the atoll structure. Atolls are typically characterized by their shallow lagoon waters, rich biodiversity, and beautiful coral formations.